Integrating formal techniques in the design of user interfaces

In this paper we present a method that aims to integrate the use of formal techniques in the design process of interactive applications, with particular attention to those applications where both usability and safety are main concerns. The method is supported by a set of tools. We will also discuss how the resulting environment can be helpful in reasoning about multi-user interactions using the task model of an interactive application. Examples are provided from a case study that we have performed in the field of air traffic control.